diy pcb making problem (acid + oxygenated water)

Rafael Ignacio Zurita rafaelignacio.zurita at
Thu Aug 27 15:37:36 UTC 2015

On Thu, Aug 27, 2015 at 12:28 PM, Werner Almesberger
<werner at> wrote:
> Rafael Ignacio Zurita wrote:
>> What I am seeing is that the toner is removed when I am trying to
>> remove the copper with acid. Then, the board left ruin :(
> Interesting effect :-) How long did you etch until you got
> this ?

I got that "interesting effect" in few boards I tried :(
But I do not loose the hopes ;)

it lasted around 7min - 10min etching I think

> The solution looks very green. Maybe add a bit of 30% peroxide
> until the color gets more blueish. You also seem to have a lot of
> etching solution. You only need enough to submerge the board.
> If you use a hermetically sealable container, you can reuse the
> solution. If it gets stale, you can refresh it by adding a bit of
> HCl and peroxide.

Thanks a lot Werner. I will try with a bit more of peroxide like you suggested.
News soon :)


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